[MacPorts] #63694: mpv: fatal error encountered while reading from module 'Foundation'

[MacPorts]

#63694: mpv: fatal error encountered while reading from module 'Foundation'
---------------------------+------------------------
  Reporter:  ShadSterling  |      Owner:  i0ntempest
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:
      Port:  mpv           |
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Comment (by ShadSterling):

 It looks like MacPorts is building for macOS versions ending in ".0"; I'm
 running macOS 11.6, and after downgrading from Xcode 13.1 to Xcode 12.5.1
 I see a lot of warnings about files "built for newer macOS version (11.2)
 than being linked (11.0)"

 It also looks like Xcode only ever ships with an SDK for one version of
 macOS, which sometimes is a higher version than the host OS - as was the
 case when my macOS 11.6 was updated to Xcode 13.1 which has the SDK for
 macOS 12.0

 I would think it would be possible to add SDKs for each target version of
 macOS (especially the host version), but my quick search didn't turn up
 anything about how to do that

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Ticket URL: <https://trac.macports.org/ticket/63694#comment:26>
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